<?php

/**
 * JPGraph v4.0.3
 */

namespace lemon\JpGraph\Plot;

use lemon\JpGraph\Graph;
use lemon\JpGraph\Util;

/**
 * @class ScatterPlot
 * // Description: Render X and Y plots
 */
class ScatterPlot extends Plot
{
	public $mark;
	public $link;
	private $impuls = false;

	/**
	 * CONSTRUCTOR.
	 *
	 * @param mixed $datay
	 * @param mixed $datax
	 */
	public function __construct($datay, $datax = false)
	{
		if ((safe_count($datax) != safe_count($datay)) && is_array($datax)) {
			Util\JpGraphError::RaiseL(20003); //("Scatterplot must have equal number of X and Y points.");
		}
		parent::__construct($datay, $datax);
		$this->mark = new PlotMark();
		$this->mark->SetType(MARK_SQUARE);
		$this->mark->SetColor($this->color);
		$this->value->SetAlign('center', 'center');
		$this->value->SetMargin(0);
		$this->link		= new Graph\LineProperty(1, 'black', 'solid');
		$this->link->iShow = false;
	}

	/**
	 * PUBLIC METHODS.
	 *
	 * @param mixed $f
	 */
	public function SetImpuls($f = true)
	{
		$this->impuls = $f;
	}

	public function SetStem($f = true)
	{
		$this->impuls = $f;
	}

	// Combine the scatter plot points with a line
	public function SetLinkPoints($aFlag = true, $aColor = 'black', $aWeight = 1, $aStyle = 'solid')
	{
		$this->link->iShow   = $aFlag;
		$this->link->iColor  = $aColor;
		$this->link->iWeight = $aWeight;
		$this->link->iStyle  = $aStyle;
	}

	public function Stroke($img, $xscale, $yscale)
	{
		$ymin = $yscale->scale_abs[0];
		if ($yscale->scale[0] < 0) {
			$yzero = $yscale->Translate(0);
		} else {
			$yzero = $yscale->scale_abs[0];
		}

		$this->csimareas = '';
		for ($i = 0; $i < $this->numpoints; ++$i) {
			// Skip null values
			if ($this->coords[0][$i] === '' || $this->coords[0][$i] === '-' || $this->coords[0][$i] === 'x') {
				continue;
			}

			if (isset($this->coords[1])) {
				$xt = $xscale->Translate($this->coords[1][$i]);
			} else {
				$xt = $xscale->Translate($i);
			}

			$yt = $yscale->Translate($this->coords[0][$i]);

			if ($this->link->iShow && isset($yt_old)) {
				$img->SetColor($this->link->iColor);
				$img->SetLineWeight($this->link->iWeight);
				$old = $img->SetLineStyle($this->link->iStyle);
				$img->StyleLine($xt_old, $yt_old, $xt, $yt);
				$img->SetLineStyle($old);
			}

			if ($this->impuls) {
				$img->SetColor($this->color);
				$img->SetLineWeight($this->weight);
				$img->Line($xt, $yzero, $xt, $yt);
			}

			if (!empty($this->csimtargets[$i])) {
				if (!empty($this->csimwintargets[$i])) {
					$this->mark->SetCSIMTarget($this->csimtargets[$i], $this->csimwintargets[$i]);
				} else {
					$this->mark->SetCSIMTarget($this->csimtargets[$i]);
				}
				$this->mark->SetCSIMAlt($this->csimalts[$i]);
			}

			if (isset($this->coords[1])) {
				$this->mark->SetCSIMAltVal($this->coords[0][$i], $this->coords[1][$i]);
			} else {
				$this->mark->SetCSIMAltVal($this->coords[0][$i], $i);
			}

			$this->mark->Stroke($img, $xt, $yt);

			$this->csimareas .= $this->mark->GetCSIMAreas();
			$this->value->Stroke($img, $this->coords[0][$i], $xt, $yt);

			$xt_old = $xt;
			$yt_old = $yt;
		}
	}

	// Framework function
	public function Legend($aGraph)
	{
		if ($this->legend != '') {
			$aGraph->legend->Add(
				$this->legend,
				$this->mark->fill_color,
				$this->mark,
				0,
				$this->legendcsimtarget,
				$this->legendcsimalt,
				$this->legendcsimwintarget
			);
		}
	}
} // @class
/* EOF */
